Old MacBook 2013 running Linux thinking to try open core

I just recently found out about open core. And have been using Linux on it since bigsur has been unsupported for a while.

I don’t have anything major on it for worries about data loss.

Would it make sense to just use open core and update it to venture or something newer.

It’s only the 4gb model so that’s been pretty restrictive and I most just use it for online work in the browser and minor documentation stuff. I use my PC for everything demanding. I have no issues to continue using Linux for my basic needs if updating macOS makes no sense since newer Os needs more ram I assume.

Also doing internet recovery is extremely slow one thing I don’t understand reading the instructions is can I setup the USB drive on my pc then use that to plug in and update Mac OS. Or do I need to be doing it within macOS.

Edit: forgot to specify MacBook Air 2013. 4GB/128GB